US7618567B2 - Absorbable sponge with contrasting agent - Google Patents
Absorbable sponge with contrasting agent Download PDFInfo
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- US7618567B2 US7618567B2 US10/978,321 US97832104A US7618567B2 US 7618567 B2 US7618567 B2 US 7618567B2 US 97832104 A US97832104 A US 97832104A US 7618567 B2 US7618567 B2 US 7618567B2
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- solution
- pledget
- gelatin
- biopsy
- foam
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
- A61M31/005—Devices for introducing or retaining media, e.g. remedies, in cavities of the body for contrast media
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/481—Diagnostic techniques involving the use of contrast agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/485—Diagnostic techniques involving fluorescence X-ray imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/481—Diagnostic techniques involving the use of contrast agent, e.g. microbubbles introduced into the bloodstream
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00004—(bio)absorbable, (bio)resorbable, resorptive
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00637—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for sealing trocar wounds through abdominal wall
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00646—Type of implements
- A61B2017/00654—Type of implements entirely comprised between the two sides of the opening
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3933—Liquid markers
Definitions
- the invention relates to an absorbable sponge, and more particularly, the invention relates to the delivery of a contrasting agent to a specific area or site in a mammal after a surgical or interventional procedure.
- the contrasting agent facilitates the location of the area or site even weeks or months after the initial procedure.
- Percutaneous needle biopsy of solid organs is one of the most common interventional medical procedures. Millions of percutaneous needle biopsies are performed annually in the United States and throughout the world. Percutaneous biopsy is a safe procedure which has supplanted surgical biopsy for many indications, such as biopsy and liver biopsy.
- Possible complications of needle biopsy include bleeding at the biopsy site.
- the amount of bleeding is related to a number of factors including needle size, tissue sample size, patient's coagulation status, and the location of the biopsy site.
- vascular organs such as the liver, a common biopsy target, may bleed significantly after needle biopsy.
- Sterile sponges such as GELFOAM
- GELFOAM Sterile sponges
- the sponge sheets are left in the surgical site after surgery to stop bleeding and are absorbed by the body.
- a number of techniques have used these absorbable sterile sponge materials to plug a biopsy tract to minimize or prevent bleeding.
- the absorbable sponge provides a mechanical blockage of the tract, encourages clotting, and minimizes bleeding though the biopsy tract.
- a mechanic clip device is often attached to the site where tissue is removed, so that if further treatment is later required the location of the site can be identified.
- the time period between the biopsy and treatment may be weeks during which time the clip may become dislodged thereby making it difficult to relocate the site.
- the present invention is based in part on the discovery that adding a contrasting agent (e.g, radiopaque agent) to an absorbable sponge provides for a material that not only facilitates hemostasis of a biopsy tract or other puncture wound but also permits precise identification of the site's location.
- a contrasting agent e.g, radiopaque agent
- the invention is directed to a method for marking a bodily site in a patient that includes the steps of:
- the exact location of the bodily site can be located many weeks or longer following positioning of the absorbable sponge material.
- the invention is directed to a method for performing a biopsy that included the steps of:
- the invention is directed to a liquid permeable, absorbable, gelatin sponge that is prepared by a process that includes the steps of:
- FIG. 1 is a side cross sectional view of an adaptor for delivery of a pledget to a needle
- FIG. 2 is a side cross sectional view of a syringe for connection to the adaptor
- FIG. 3 is a side cross sectional view of an adaptor and syringe combination with a pledget positioned within the adaptor;
- FIG. 4 is a side cross sectional view of the loaded adaptor and syringe combination in preparation for connection to a biopsy needle;
- FIG. 5 is a side cross sectional view of an alternative embodiment of an adaptor for delivery of a pledget including a template attached to the adaptor;
- FIG. 6 is a top view of the template as it is used for cutting a pledget from an absorbable sponge sheet
- FIG. 7 is a side cross sectional view of a portion of an organ and a system for delivering a pledget into a biopsy tract in the organ.
- the present invention is directed to an absorbable sponge material containing a contrasting agent.
- the absorbable sponge material is delivered to a specific area or site in a patient (i.e., mammal) after a surgical or interventional procedure.
- the sponge material can be placed in the biopsy tract or other puncture wound and the contrasting agent enables marking or identification of the area or site.
- the absorbable sponge will be described in connection with treatment of a biopsy tract after a percutaneous needle biopsy.
- the absorbable sponge material can also exhibit secondary benefits of, for example, facilitating hemostasis and delivering therapeutic agents.
- “Pledget” means a piece of absorbable sponge containing a contrasting agent preferably of a generally elongated shape having a size which allows injection in a hydrated state through a biopsy needle or other cannula.
- “Sponge” means a biocompatible material which is capable of being hydrated and is resiliently compressible in a hydrated state.
- the sponge is non-immunogenic and is absorbable.
- “Absorbable sponge” means a sponge which when implanted within a patient (i.e., human or other mammalian body) is absorbed by the body.
- the absorbable sponge contains a contrasting agent which may or may not be absorbable. Besides the contrasting agent, the sponge can also be used to deliver a beneficial agent such as thrombin, radiation treatment or the like.
- “Bodily site” means any tissue in a mammal where the absorbable sponge containing the contrasting agent can be introduced.
- the invention is particularly suited for introducing the absorbable sponge into tissue sites where further treatment may be required, for example, as in the case following biopsy.
- “Hydrate” means to partially or fully saturate with a fluid, such as, saline, water, or the like.
- “Kneading” of the absorbable sponge material means both dry and wet manipulation of the sponge material which compresses, enlarges, or changes the shape of the sponge material causing the sponge material to have improved expansion response.
- “Contrasting agent” means a biocompatible material that is capable of being detected or monitored by fluoroscopy, X-ray photography, CAT scan, ultrasound, or similar imaging techniques following placement into a mammalian subject.
- Preferred contrasting agents are radiopaque materials.
- the contrast agent can be either water soluble or water insoluble. Examples of water soluble contrast agents include metrizamide, iopamidol, iothalamate sodium, iodomide sodium, and meglumine. Examples of water insoluble contrast agents include tantalum, tantalum oxide, and barium sulfate, each of which is commercially available. Other water insoluble contrast agents include gold, tungsten, and platinum powders. Some radiopaque contrasting agents are available in liquid form.
- the contrast agent is water insoluble (i.e., has a water solubility of less than 0.01 mg/ml at 20° C.).
- the absorbable sponge material of the present invention is preferably a liquid permeable, water insoluble gelatin based sponge that has contrasting agent incorporated in the matrix of the sponge.
- incorporated is meant that the contrasting agent is substantially dispersed throughout the sponge so that the contrasting material is not simply found on the periphery of the sponge.
- the sponge is made by mixing a suitable organic solvent (e.g., formaldehyde) with an aqueous solution of gelatin.
- the organic solvent facilitates the cross linkage of gelatin polymers. It is expected that glutaraldehyde may also be suitable.
- the resulting solution is then incubated typically at slightly above room temperature (30°-40° C.). Subsequently, a contrasting agent is added and the resulting mixture beaten to produce a firm foam. Thereafter, the foam is dried to produce the absorbable sponge material.
- the aqueous gelatin solution containing 3-10% gelatin by weight is prepared as a warm solution (e.g., 80° C.) to help dissolve the gelatin.
- the solution is then allowed to cool (e.g, 35°-40° C.) before the organic solvent is added.
- a preferred organic solvent is formalin (an aqueous solution of formaldehyde).
- formalin an aqueous solution of formaldehyde.
- the amount of formalin used will control the hardness of the sponge and its rate of absorption into the body. The more formalin used, the harder the sponge and the lower the absorption rate. Typically, the amount used is between 0.01 to 10% based on the gelatin solution.
- the beating or whipping process takes about 5-15 or more minutes to produce a firm foam of about 4 to 8 times the volume of the original solution.
- the drying process initially begins with oven drying in the presence of circulating air at about 30° to 33° C. or higher and 10% humidity. After the foam is thoroughly dried, the foam can be heated to an elevated temperature of about 140° C. for a sufficient length of time (e.g., 3 hrs) until the sponge is firm. Suitable absorbable sponge materials are further described in U.S. Pat. No. 2,465,357 which is incorporated herein by reference.
- the contrasting agent must be added prior to beating the gelatin/formalin solution. The reason is that once the foam material is produced, the contrasting agent cannot be incorporated into the matrix of the sponge.
- contrasting agents that are liquids it is preferred that they be added to the gelatin/formalin solution prior to being beaten to form the foam product. This will insure that the contrasting agent is dispersed throughout the sponge.
- absorbable sponge materials containing different amounts of contrasting agent were prepared and tested. Specifically, 5 grams of pork gelatin (Bloom value 275) were mixed in 100 grams of water at 80° C. and the solution was allowed to cool to 35° C. before 0.03 cc of 40% formalin was added. The resulting solution was incubated at 35° C. for 2 hours before tantalum powder (50 to 150 grams) was added. The liquid was then vigorously mixed in a malt mixer to produce a foam. The foam was then oven dried at 35° C. for 12 hours.
- the absorbable sponge material was examined with a fluoroscope and found to be extremely visible. Moreover, placement of the sponge material with contrasting agent in puncture sites of a swine model demonstrated that the absorbable sponge exhibited good hemostatic properties as well.
- the sponge material with contrasting agent of the present invention is particularly suited for biopsies and other percutaneous procedures where knowledge of the site of initial treatment, e.g., tissue removal, is important.
- the absorbable sponge material can be employed with any suitable medical instrument, a preferred device and method for facilitating hemostasis of a biopsy tract is described herein to illustrate use of the absorbable sponge material. This technique is further described in U.S. patent application Ser. No. 09/247,880, filed on Feb. 10, 1999, and entitled “Device and Method for Facilitating Hemostasis of a Biopsy Tract,” now U.S. Pat. No. 6,086,607, is incorporated herein by reference.
- FIG. 1 shows the adaptor 12 in which the pledget 18 is placed for hydration and for delivery through the biopsy needle 16 .
- the adaptor 12 allows pieces of absorbable sponge material with relatively large cross sections to be easily delivered through a biopsy needle 16 with a much smaller cross section.
- the adaptor 12 also functions to remove air from the pledget 18 .
- the adaptor 12 which delivers the hydrated pledget 18 to the needle 16 includes a first end 30 having an annular lip 32 or female luer fitting for connection to the syringe 14 .
- a second end 34 of the adaptor 12 has a male luer fitting 36 for connection to a biopsy needle 16 or other cannula.
- the luer fitting 36 includes a tapered external surface 38 and a retaining ring 40 with internal threads for receiving an annular lip of the biopsy needle.
- the adaptor 12 has an internal lumen with a first diameter D 1 at the first end 30 and a second diameter D 2 at the second end 34 . Between the first and second ends of the adaptor 12 a tapered section 42 of the adaptor provides a funnel for compressing the hydrated pledget 18 prior to injection through the biopsy needle 16 and needle hub 28 .
- the adaptor 12 may be formed in any known manner such as by molding from a plastic material.
- the adaptor 12 is transparent so that the pledget 18 can be viewed through the adaptor and the user can visually monitor when the pledget is loaded within the adaptor and when the pledget has been delivered into the needle.
- the adaptor lumen may be provided with a friction reducing coating for improved delivery. The delivery fluid also reduces friction for improved delivery by wetting the exterior surface of the pledget 18 .
- the syringe 14 includes a male luer fitting 46 , a fluid chamber 48 , and a plunger 50 .
- the first end 30 of the adaptor 12 is connectable to the luer fitting 46 of the conventional syringe 14 .
- the syringe 14 may be provided with a spring 52 for automatic filling of the syringe 14 with a predetermined volume of fluid.
- the biopsy needle 16 used with the present invention is preferably a co-axial biopsy needle, such as a bi-axial or a tri-axial biopsy needle.
- a co-axial biopsy needle includes an outer needle or cannula through which a tissue sample is removed with a tissue scoop or other biopsy instrument. Once the tissue sample has been removed, the outer cannula remains in the patient as illustrated in FIG. 4 .
- the cannula for delivery of the sponge pledget has been described as a biopsy needle, the cannula may be a catheter, sheath, or any other type of cannula.
- FIG. 3 shows the loading and hydration of the pledget 18 within the adaptor 12 .
- a pledget 18 is cut and placed within the adaptor 12 from the first end 30 of the adaptor.
- the syringe 14 is filled with a predetermined amount of fluid, such as saline, and is connected to the first end 30 of the adaptor 12 by the luer fitting 46 .
- the plunger 50 of the syringe 14 is then depressed slowly causing fluid to pass into the adaptor 12 , hydrating the pledget 18 , and filling the adaptor with a column of fluid.
- the user waits a few seconds once the fluid is injected into the adaptor 12 until the pledget 18 is adequately hydrated creating a lubricous surface on the pledget.
- the pledget 18 may expand within the adaptor to fill or nearly fill the lumen of the adaptor.
- the adaptor 12 with the pledget 18 hydrated within the proximal end is ready to inject the pledget into a biopsy tract to facilitate hemostasis within the biopsy tract.
- the adaptor 12 may be loaded prior to beginning the biopsy procedure.
- the outer sheath of the biopsy needle 16 through which the biopsy has been taken is maintained in place within the biopsy tract, as shown in FIG. 4 .
- the biopsy needle 16 provides pre-established targeting of the delivery site for delivery of the absorbable sponge pledget 18 and eliminates the uncertainty of re-access.
- the luer fitting 36 of the adaptor 12 is connected to the biopsy needle hub 28 , as illustrated in FIG. 4 .
- the biopsy needle 16 is withdrawn a short distance, such as about 1 to 20 mm, along the biopsy tract to provide space for the pledget 18 to be received in the biopsy tract. Additional fluid is then rapidly injected by the syringe to move the pledget 18 into the biopsy needle 16 .
- the adaptor lumen When the adaptor lumen has been blocked by the hydrated pledget 18 which has swelled within the adaptor, injection of additional fluid will push the pledget through the tapered section 42 of the adaptor. If the adaptor lumen has not been entirely blocked by the pledget 18 , the venturi effect will help draw the pledget through the tapered section 42 of the adaptor.
- the pledget 18 After the pledget 18 is moved to the biopsy needle 16 , the pledget 18 is then delivered from the needle 16 to the biopsy tract by rapid injection of additional fluid by the syringe 14 .
- the hydrated pledget 18 quickly expands upon delivery to fill the available space in the biopsy tract to facilitate hemostasis and provide localized compression.
- the absorbable sponge material of the present invention can be shaped into the required size by conventional means. Pledgets may be cut with a punch or a stencil or template and knife. Once hydrated, the pledget 18 can be easily compressed to fit into a lumen having a smaller cross sectional area than the original cross sectional area of the pledget. Additionally, the kneading of the hydrated pledget 18 during delivery encourages air trapped within the absorbable sponge to be expelled and replaced with fluid, allowing rapid expansion upon delivery.
- Pledgets 118 with increased cross sectional area proximal ends may be prepared in a variety of manners.
- the increased proximal mass can be achieved by cutting the pledget with an enlarged proximal end.
- the pledget 118 may be formed by folding, rolling, compressing, or otherwise manipulating the sponge material to the desired shape.
- the proximal pledget mass may also be increased by adding separate pieces of material to the proximal end of the pledget. This additional material may be layered, wrapped, coiled or attached to the pledget in any other manner.
- the pledgets may also be formed by molding, bump extruding, dipping, or the like.
- the larger cross sectional area proximal end is generally about 1.2 to 4 times the cross sectional area of the distal end.
- the proximal end with the larger cross section area preferably extends along about 1 ⁇ 8 to 3 ⁇ 4 of the total pledget length.
- the pledget 118 illustrated in FIG. 5 has been formed by cutting a strip of material from an absorbable sponge sheet 20 with the aid of the template 122 as illustrated in FIG. 6 . After the strip is cut, the proximal end of the strip is then folded back onto itself to form a pledget 118 with an increased cross sectional area and material mass at a proximal end.
- a preferred embodiment of a pledget for delivery down a 20 gauge biopsy needle or cannula has a size of approximately 0.1 ⁇ 1.5 ⁇ 0.06 inches and is folded as illustrated in FIG. 5 to an overall length of about 0.9 inches. Placing this pledget 118 in an adaptor 112 having a largest internal diameter of 0.125 inches allows the pledget to be delivered to a 20 gauge or larger biopsy needle.
- a pledget 118 maybe delivered through the cannula the biopsy site.
- the pledget 118 for use in the system employing an 18 gauge or larger biopsy needle may be formed from a strip which is approximately 0.11-0.12 inches wide by about 3.125 inches long with a thickness of about 0.06 inches and folded to an overall length of about 2.2 inches. This pledget having a 28 which is attached to the distal end of the adaptor.
- the pledget may be delivered to the biopsy tract by holding the biopsy needle or cannula 16 stationary and injecting the pledget through the biopsy needle. If additional pledgets are to be delivered, the biopsy needle 16 is withdrawn a distance sufficient to accommodate an additional pledget and the additional pledget is then injected.
- An alternative method of delivering the pledget into the biopsy tract includes withdrawing the biopsy needle or cannula 16 during delivery of the pledget 18 to deliver the pledget in an elongated trail which follows the biopsy tract. Placing the absorbable sponge material in a trail which fills the entire biopsy tract provides the added benefit of providing hemostasis along the entire biopsy tract. This is particularly helpful for stopping the bleeding of biopsy tracts in organs which tend to have excessive bleeding such as the liver, kidney, spleen, and other vascular organs.
- one method of the present invention involves the delivery of the pledget into the biopsy needle by a predetermined amount of fluid.
- the biopsy needle is then withdrawn at a velocity V while the pledget material is ejected from the biopsy needle at a velocity E with respect to the biopsy needle.
- the velocity V at which the biopsy needle is withdrawn is equal to or less than the velocity E at which the absorbable sponge material is delivered.
- the control of injection of fluid and withdrawal of the needle to achieve the desired trail of absorbable sponge material in the biopsy tract maybe controlled with an injection controlling device.
- the adaptor may be used to deliver the pledget into the biopsy needle 16 and then the adaptor is removed from the biopsy needle.
- a plunger or stylet 80 which is generally provided with the biopsy needle 16 for inserting the biopsy needle is then used to deliver the pledget from the biopsy needle.
- the biopsy needle extends through the tissue 84 and into the organ 86 for removal of a core of tissue.
- the pledget is injected into the needle 16 and the plunger 80 is placed within the biopsy needle so that a distal end of the plunger abuts the proximal end of the pledget 118 .
- the plunger 80 is then held stationary while the biopsy needle 16 is withdrawn from the biopsy site.
- the plunger 80 causes the pledget 118 to be delivered in a trail 88 which fills the biopsy tract.
- the trail 88 preferably extends along the entire biopsy tract to or past a surface of the organ 86 .
- the delivery of the trail 88 of absorbable sponge material provides an advantage over the delivery of discrete blobs of material because the trail is able to provide hemostasis along the entire tract.
- a blob of absorbable sponge material is delivered within the tract at a depth of 1-2 cm from the surface of the organs, this 1-2 cm of biopsy tract may continue to bleed significantly.
- the pledget may be delivered as a plug.
- the plunger 80 is advanced into the needle 16 pushing the pledget out of the distal end of the needle while the needle is held stationary.
- a combination of delivery of plugs and trails may also be used.
- the pledget material may be delivered entirely within a single anatomical structure or may cross two or more anatomical structures such as an organ, surrounding tissue and facial layer.
- the biopsy needle 16 is retracted a distance sufficient to provide a space to accommodate an additional pledget 18 and the injection procedure described above is repeated for the additional pledget(s).
- additional pledgets 18 may be injected beside an initially injected pledget until the cavity is filled.
- biopsy is most commonly performed by biopsy needle, biopsy may also be performed through other cannulas, such as catheters, long needles, endoscopes, or the like.
- the treatment procedure according to the present invention can be used for facilitating hemostasis of puncture wounds through different types of cannulas including needles, catheters, endoscopes, and the like.
- the treatment procedure and systems according to the present invention may be used to deliver absorbable or non-absorbable sponge for other therapys.
- sponge may be delivered for cosmetic or reconstructive bulking or for temporary or permanent intravascular embolization.
- the absorbable sponge pledget 18 may be used to deliver a beneficial agent, such as, thrombin, radiation treatment, or the like.
- the pledget can also be used to deliver therapeutic agents, such as radioactive isotopes for localized treatment of tumors, anti-cancer agents, anti-metastatic agents, and the like.
- therapeutic agents such as radioactive isotopes for localized treatment of tumors, anti-cancer agents, anti-metastatic agents, and the like.
- anti-cancer agents include 5-fluorouracil, cisplatin, prednisone, and others described in U.S. Pat. No. 4,619,913 which is incorporated herein by reference.
- the absorbable sponge pledget 18 may be presoaked with the beneficial agent for delivery to the biopsy tract.
- the pledget 18 may be hydrated with the beneficial liquid agent or the agent may be delivered to the pledget after the pledget is placed within the biopsy tract.
- a pledget formed of inventive absorbable sponge material preferably will be absorbed by the body within 1 to 6 weeks. However, the pledget material may be designed to provide different rates of absorption. If the contrasting agent employed is also absorbable, the contrasting agent should be absorbed at approximately the same rate as the sponge material. Where the contrasting agent is non-absorbable, it will remain at the site.
Abstract
Description
Claims (16)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/978,321 US7618567B2 (en) | 1998-05-01 | 2004-10-29 | Absorbable sponge with contrasting agent |
US12/578,088 US20100029908A1 (en) | 1998-05-01 | 2009-10-13 | Absorbable sponge with contrasting agent |
US12/887,945 US20110014290A1 (en) | 1995-09-15 | 2010-09-22 | System and method for facilitating hemostasis with an absorbable sponge |
US13/776,952 US20130172737A1 (en) | 1998-05-01 | 2013-02-26 | Absorbable sponge with contrasting agent |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/071,670 US6071301A (en) | 1998-05-01 | 1998-05-01 | Device and method for facilitating hemostasis of a biopsy tract |
US09/071,284 US6162192A (en) | 1998-05-01 | 1998-05-01 | System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge |
US09/335,452 US6183497B1 (en) | 1998-05-01 | 1999-06-17 | Absorbable sponge with contrasting agent |
US63081400A | 2000-08-02 | 2000-08-02 | |
US09/966,611 US20020038133A1 (en) | 1998-05-01 | 2001-09-27 | Absorbable sponge with contrasting agent |
US10/978,321 US7618567B2 (en) | 1998-05-01 | 2004-10-29 | Absorbable sponge with contrasting agent |
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US09/966,611 Division US20020038133A1 (en) | 1995-09-15 | 2001-09-27 | Absorbable sponge with contrasting agent |
US09/996,611 Division US6903200B1 (en) | 2000-12-27 | 2001-11-30 | Human α1 chain collagen |
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Application Number | Title | Priority Date | Filing Date |
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US12/578,088 Continuation US20100029908A1 (en) | 1995-09-15 | 2009-10-13 | Absorbable sponge with contrasting agent |
Publications (2)
Publication Number | Publication Date |
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US20050059080A1 US20050059080A1 (en) | 2005-03-17 |
US7618567B2 true US7618567B2 (en) | 2009-11-17 |
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US09/335,452 Expired - Lifetime US6183497B1 (en) | 1995-09-15 | 1999-06-17 | Absorbable sponge with contrasting agent |
US09/966,611 Abandoned US20020038133A1 (en) | 1995-09-15 | 2001-09-27 | Absorbable sponge with contrasting agent |
US10/978,321 Expired - Fee Related US7618567B2 (en) | 1995-09-15 | 2004-10-29 | Absorbable sponge with contrasting agent |
US12/578,088 Abandoned US20100029908A1 (en) | 1995-09-15 | 2009-10-13 | Absorbable sponge with contrasting agent |
US13/776,952 Abandoned US20130172737A1 (en) | 1998-05-01 | 2013-02-26 | Absorbable sponge with contrasting agent |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
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US09/335,452 Expired - Lifetime US6183497B1 (en) | 1995-09-15 | 1999-06-17 | Absorbable sponge with contrasting agent |
US09/966,611 Abandoned US20020038133A1 (en) | 1995-09-15 | 2001-09-27 | Absorbable sponge with contrasting agent |
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US12/578,088 Abandoned US20100029908A1 (en) | 1995-09-15 | 2009-10-13 | Absorbable sponge with contrasting agent |
US13/776,952 Abandoned US20130172737A1 (en) | 1998-05-01 | 2013-02-26 | Absorbable sponge with contrasting agent |
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EP (1) | EP1191884A1 (en) |
JP (1) | JP4460203B2 (en) |
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CA (1) | CA2371841A1 (en) |
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WO2000078228A1 (en) | 2000-12-28 |
EP1191884A1 (en) | 2002-04-03 |
US20020038133A1 (en) | 2002-03-28 |
WO2000078228A9 (en) | 2002-09-26 |
AU5877200A (en) | 2001-01-09 |
JP2003502099A (en) | 2003-01-21 |
US6183497B1 (en) | 2001-02-06 |
JP4460203B2 (en) | 2010-05-12 |
US20050059080A1 (en) | 2005-03-17 |
US20100029908A1 (en) | 2010-02-04 |
CA2371841A1 (en) | 2000-12-28 |
US20130172737A1 (en) | 2013-07-04 |
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